Well, as long as they aren't horses or cows, they are all wee ones to me (my own dog is a St. Bernard
and yet he gets called little guy all the time). ;)
Anyway, I am quite concerned about this lump. In regards ***** ***** if there is any chance of a snake bite, then I do want people to err on the side of caution and have them seen. Still, with his local vet having just examined this and no mention of wounds or punctures, I would hope we could put that down our list of concerns. But if we have any doubt a second vet opinion (ER or another practice) may be worthwhile here.
That said, no matter what this lump is, I do think it is worth ringing your vet as soon as they are open (sooner with the ER vet if you thought he was very painful) to have them dispense dog safe anti-inflammatories (ie Metacam, Onsior, Rimadyl
, etc). That way we can reduce the discomfort and swelling for him. And I would say that is a priority for him.
Otherwise, we have to consider what could arise here and would cause clear discharge. Where it is located is a bit low for salivary gland problems and its diffuse appearance doesn't fit with a cyst. Instead, I would be more suspicious of a seroma. This is where the body leaks serum into the space between the muscle
and skin. This happens when dogs have had a injury to the area (if another dog grabbed him and yanked the skin away from the muscle) or can be a reaction to an ongoing irritation in the area (if he has gotten a tracking foreign body like a foxtail/grass awn). And without a history of trauma and all this fluid around a hard lump (which could be an abscess), that would be a consideration here. As well, thought not usually so quick to appear, we can see some growths
cause odd fluid build ups as the muck about with the dog's circulation in the area.
With all this in mind, if we have a focal abscess setting this all off, then antibiotics would reasonable. Still, it just looks like there is more going on here. Therefore, I would at least want his vet to add in pain relief at this point and would advise warm compressing the area (to encourage fluid reuptake). But if we do that and we are not seeing positive progress within a few days, then it'd be best to have him rechecked (or a second opinion) and steps taken to potentially explore this and see what the mass is, remove it, and help the body settle.
Please take care,