When we went for a holiday to Las Vegas 2 yrs ago and went to PetSmart, hubby and I saw how small their cage for guinea pigs are. It was 4 or 5 guinea pigs in a glass display that I think was supposed to be for smaller animals. We went there to look for something we can buy for our piggies but after seeing those animals, we left the store right away. I felt so awful for them and I refuse to go back to their petstore again.
I know we have petstores like these in the UK but in my opinion the PetsAtHome stores I've been to are a lot better than that PetSmart I've seen. The PetsAtHome I've been to atleast have their own Vets4Pets inside the shop (Rhyl, Llandudno, Aintree, Liverpool and Wrexham). One time that we saw a guinea pig having breathing difficulties, we informed the staff and they sent it straight to their vet. We don't know what happened to it but hopefully their vet there had looked at it and gave some treatments.