My dog has a hard lump on his leg after grooming. What could it be?

That is a large, lobulated lump (no just one defined lump) in a location that would generally never have something like a swollen lymph nodes. I recommend making an appointment with your vet for a fine needle aspirate (where they aspirate cells from the mass and put them on a slide to be sent out for review) to determine if it is an abscess or a tumor/cancer of some sort. Best wishes for Diesel!

Without a physical exam or diagnostics, it is difficult to determine if this is something to worry over. Ideally, a fine needle aspirate or biopsy should be done to collect samples for pathology. This may provide a diagnosis. X-rays of the limb may be recommended to rule out bony involvement. Since you state it is growing, it should be removed before it becomes too large. As it is, that is a difficult area to close after a mass removal.

This lump could be a cyst, abscess, lipoma, benign tumor, or a malignant tumor. Any suspicious lumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the lump to get a sample of its cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. Once the cause of the lump is diagnosed, the vet can discuss treatment options if needed. Give her vet a call in the morning to make her an appointment. Best of luck.

You don't mention exactly what the first growth was that was removed from the left side of his neck, but hopefully that was either benign, or perhaps not but was completely removed with the surgery. Lumps can appear anywhere on a dog, and they certainly seem to increase in frequency as dogs get older. I wouldn't panic, but yes, the 2 situations you've already suspected are possible, and I'll add a third: 1.) The groomer went too close with the clippers, and nicked him. 2.) This is a new growth, which may or may not be related to the first one (i.e. may be the same type or something completely different). 3.) The groomer could have nicked a growth with the clippers! It does sound like it's pretty nasty, and I tend to be fairly aggressive with wounds that may have happened at the groomers, since they can easily get infected. I would recommend getting Brody in to your vet today for evaluation, cleaning of the area, and possibly oral antibiotics.

This can be one of two things: 1) a small abscess that has ruptured. 2) a small tumor that did not have enough room to grow and therefore started to ulcerate and finally ruptured. Since it is on a leg and deep, you should have your veterinarian have a look at it, to see whether any vital structures are involved and whether it is a tumor that needs to be removed.

This may be a pimple (little abscess), cyst or a tumor. You should have it examined by your veterinarian as tumors should be removed ASAP. An abscess can usually be treated with antibiotics and/or be lanced, and a cyst can be evacuated. Your vet may want to do a fine needle aspirate (he takes some material from the bump with a needle and then looks at it under the microscope) to determine whether the mass is concerning. Since this is obviously bothering your dog (it looks like Bentley is licking it), I would have this examined very soon.

This bump on Aspen's leg could be a cyst, a lipoma, a benign tumor, or a malignant tumor. Any suspicious bumps should be examined by the vet. The vet can perform a test called a fine needle aspirate on it. To do this, the vet sticks a small needle into the bump to get a sample of it's cells, and examines the cells on a slide under a microscope. It's usually painless to the animal, and relatively quick to perform. I would take Aspen into the vet tomorrow to have the bump examined and diagnosed so it can be treated.