Quite a lot. Laboratory tests in dogs allow us to get information from things or organs, perhaps internally, that we can’t otherwise determine from an outward exam. And that’s the best way to look at it. Because I can put my hands on a dog, I can look at things, and I can check their color and listen to their heart and do all those kinds of things. But I can’t tell you what their liver function is. I can’t tell you what their kidney function is. I can’t tell you what their blood sugar is. So that’s where laboratory tests come in and give us answers that we may not otherwise be able to see from the outside.

The most common things that I do on a day-to-day basis would be things such as heartworm tests, fecal samples or stool samples, maybe urinalysis, and probably almost as common we do things like chemistry panels and CBCs. Those are probably the big five or so types of lab tests run in veterinary clinics day-to-day, numerous times a day. We might have to send off other lab tests, like maybe a test for Cushing’s disease, like a low dose dex suppression test or an ACTH stim test or thyroid testing. You could pick a disease presentation, and there’s probably a specialty test that I can run to give you more information about it. But the ones I listed previously were probably the most common that we use.

Again, what the dog presents for will dictate what we have to do. And not to be repetitive, but on wellness visits, yearly checkups, heartworm tests, stool samples, and maybe even some wellness blood work, which is a CBC chem. Those are the most common. If you bring an animal in that presents for PU/PD, drinking a lot of water, urinating a lot…maybe they’re losing weight or dehydrated, then, no. My focus goes more to diabetes, hyperthyroidism, kidney failure, those kinds of things. So I’m much more inclined to get CBC chemistry and urinalysis on those animals. So again, it just depends on what they’re presenting for, how sick they are, what their clinical signs are. All of that is going to dictate what tests we potentially run.

It depends on the veterinarian you use and what test that veterinarian runs. All the things I keep mentioning time and again, CBC chemistry, urinalysis, all of that. Many veterinarians now have those kinds of machines or equipment in-house in their clinic. The average turnaround time is probably 10 minutes for CBC chem and urinalysis. If I’m doing fecal and heartworm, it’s a little less than that. It’s probably more like six to eight minutes to have those two back.

If I have to submit a larger test, like an ACTH stim test or thyroid panel or level or a bunch of other things I don’t list, I don’t have those in-house. So those have to be pulled and sent to an outside laboratory. And depending on what test it is, it’s either 24 hours to perhaps 48 to 72 hours for some of the longer taking tests. It’s completely variable and depends on what it is and the lab test. But anywhere from minutes for point-of-care diagnostics or a few days for some of the bigger, harder-to-find tests.

On the average size dog, meaning let’s say anywhere from Labradors on down, most blood panels that have to we pull require a jugular stick from the jugular vein. If we’re simply putting a heartworm test for lab work, that just takes a few drops of blood. We can usually pull that from a front leg or cephalic vein. But suppose we have to pull enough blood to do a CBC, chemistry, or any kind of send-off test. In that case, that usually requires several milliliters of blood, and it’s usually more efficient, quicker, and safer for the dog if we pull it from a jugular sample.

Do dogs like needle sticks? Probably not any more than you or I like needle sticks. So is there discomfort? I mean, yeah, they’re getting poked with a needle. Do I always use the biggest needle I can? Of course not. No. I try to use a small needle, but it’s a compromise. The smaller the needle I use, the longer it takes to get the sample, and the longer I have to restrain the dog and hold them in that awkward position.

So there’s a fine line between that. Not to mention, let’s also be honest; a lot of dogs are different. Some dogs are very stoic. You can do just about anything in the world to them, and they will just sit there wagging their tail and not even moving. You have other dogs that, if you pinch them, they will act like you did something a lot worse than pinch them. So it just depends on the dog’s temperament, how big of a blood sample we need, and what kind of restraint would be necessary to get that blood sample.

That’s a fair question. So number one, most clinics have a very well-trained staff that can do all the sticks themselves if necessary—we do here. If time allows, I’m back there pulling it with them or for them. But I have a very well-trained staff who knows how to restrain the animals and how to pull the samples themselves if necessary. So that’s step one.

Number two, if we have an animal that is fractious, nervous, anything like that, where snapping or biting is even a likely happening, then we’ll put a muzzle on the dog just for everyone’s safety, the dog included. And if that’s not enough, then there are cases where we have to get blood work done. Say we have a very, very ill animal and he doesn’t like anybody. So muzzle or no muzzle, he’s going to fight you tooth and nail. Sometimes, the only safe way to do it—both for technicians, veterinarians, owners, and patients—is just to give them mild sedation first, or sedative first. I don’t do that with everybody. Far from it. I don’t like to do it if it’s not necessary. But sometimes that’s the only effective way to safely and humanely get a sample from an animal.

Depending on what test we run and if we do the lab in the veterinary clinic, I would argue to tell you between five and 10 minutes you’ll have them back. And again, when we say lab results, we’re talking about fecals, urine analysis, CBCs, chemistry, maybe a coag panel. Most clinics, including ours, has in-house equipment that allows for point of care blood work, such as that, or lab work, I should say. In the cases of those tests I just rambled off, I’ll have the results in 5-10 minutes. Some tests that have to be sent off, like phenobarbital, certain thyroid panels, ACTH, or various endocrine type panels that we’re screening for, those likely have to be sent off to an outside lab. And that might take anywhere from one to maybe even two, three days to get back.

It depends on what test we run. I was just laughing because you sounded very nervous about your follow-up blood work, but that’s okay. I’m sure the dog was too. No, it depends on what we uncover on the initial blood work. Let’s say we’re doing wellness blood work and your dog is, just as the name implies, well, and there is nothing doing, then no. There’ll be no follow-up. Maybe next year we’ll want to do it again just to make sure we’re staying on top of things. But no, there wouldn’t be any follow-up.

Where follow-up blood work would come in is, say, you have an animal with elevated kidney numbers. Let’s just pick kidneys for a second. You do that. You put them on a special diet. You might put them on Azodyl or some other supplement to help drop some of those numbers. Maybe we increase their fluids. Maybe we’re giving them sub q fluids weekly or daily, something along those lines. And we’ll want to follow up in either days or weeks to ensure that those values are going in the right direction. So that kind of follow-up, yeah, makes perfect sense. If there’s no illness underlying and your dog’s perfectly healthy, then, of course, no follow-up is necessary. So it just varies on what we’re running and the condition of the patient.

I think it’s a good idea. And I’m faced with this question a lot because they’ll come in for a yearly checkup on a, I don’t know, let’s say 10-year-old dog, and he’s perfectly fine. Well, I get it. You wonder—does he need it? I don’t know yet, to be honest with you. Do I recommend it? Yeah. You bet I do. Why? Because he’s 10. If I catch something early, then I have a much better chance to treat it effectively. If I don’t look, I’ll never know. Maybe he’s a dog that comes in two weeks after he was just here, and now his kidneys are greatly impaired. He’s in kidney failure. Something like that. Would I have had better results knowing that two weeks prior and addressing it then? Heck yeah, I would have.

So if given the opportunity, yeah, I will always choose for the side of being cautious and more proactive when I can. But the word “need” blood work is an interesting word because it’s, like I said, if you don’t look, you’ll never know. So it’s my job to be the advocate for the pet and recommend things earlier if possible so we can catch them earlier and have a better treatment outcome.

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