Our 7.5yr old Cavachon (1/2 Cavalier King Charles Spaniel, 1/2 Bichon) was acting what appeared to us as "fine" all day yesterday. Last night at about 7:00pm he starting whimpering/whining and walking around a little....very slowly. Made me think he had a tummy ache (no limping, bleeding, or licking that would indicate an injury). We thought maybe he was going to throw up, so I sent him outside. He spent about 15 minutes out there and when he came back in the house, went up the steps VERY slowly, not jumping like he normally does. He spent the rest of the evening moving very slowly, head hung low, tail between his legs, etc. To my knowledge, he never threw up or had diarrhea or anything. He also didn't get into anything that I'm aware of.
This morning, he wouldn't come out of the bedroom (he sleeps with my 2 DDs). He usually follows older DD everywhere she goes. DD12 ended up carrying him out to the couch where he has stayed ever since. He usually asks to go outside almost immediately in the morning and doesn't seem even remotely interested despite our prodding and prompting. He will barely even lift his head.
He has no pre-existing conditions, is in generally good health, and hasn't really ever had any problems. I really, REALLY cannot afford a vet trip right now. We will pull from our bill $$ to take him in if we need to (the thought of that makes my skin crawl, but....) - anyway, opinions?? Can we wait it out through today and see how he does? Any ideas on what could be ailing him? What we can do to help him? I think I'd feel better if he was displaying some sort of symptom or something that I could at least identify.
This is our baby: