I have a 9 year old Male Boxer. I've started noticing that he has tumors growing in various places on his body. Some are internal and are some are external such as one growing between the pads of his paw. He also has had a couple episodes of falling over and kind of seizing and having labored breathing and sometimes stops breathing for like 15 seconds maybe more. Does it sound like it's going to be an expensive problem if it's treatable? If so, we don't have a lot of money and would it be best to have him put to sleep instead of living with these growths and "seizure" like episodes? I can't stand to see animals suffer and I already feel guilty for not being able to afford major medical bills for him. Thank you for any advice.