This is why you have to be very careful of the hay you buy for guinea pigs. Hes going to the vet tomorrow and hopefully he will be ok but if you want to help out ko-fi.com/puritysin1 we could use the help with the vet bill. Sorry about the beg posting feel free to ignore.

https://i.poastcdn.org/6bd03b4bbcd7bd255e1408abd61a4944f80219dfb40c2921a900c9d1fd89fc81.jpg 

 I used woodchips, why use hay?