Signs of RI?

I fed a small rat to my yearling Male BP the other day and when I went to check on him I noticed that his mouth was wattery and full of what looked like saliva. The saliva was sticky and his mouth looked like it was full of water and I thought he was going to regurge but the next day he pooped and this issue went away. What could be the problem?

Thanks,
Rusty

An increase in mucous in the mouth is one sign of RI, yes. I would take him to the vet even if you don't notice the saliva now. Better safe than sorry.