Massive cyst (?) on dog’s hind leg

Hi! My mom’s Japanese Chin has had some type of tumour or cyst on his hind leg with a small hole in it for a couple years now. It’s grown it’s max size, it’s hard and we can squeeze it with absolutely no reaction. It used to bleed and ooze but hasn’t for probably 1 year+. What could this be? I can’t find anything similar on Google. He is 15. He doesn’t limp or anything from it. Thanks❤️

dog has done size lump on inner back leg

My 11 year old boston terrier has this new bump i just noticed. no other symptoms. just the one bump with a smaller harder bump inside of it. i don’t know if i should get it checked.

Remember this?

I sense a disturbance

Old age should burn at close of day

That look you make when he poops his pants and his stank hits you in the eye....

I'm a little nervous

Should've Considered Getting a Hummer

Where has the year gone?

Will someone shut him up already?!

FFS it's been like 30 minutes