[header] How to care for a guinea pig after neutering [title] Bring him or her home in a cat carrier filled with a blanket or a cardboard box also filled with a blanket on the bottom. [step] It's also a good idea to put some veggies in there for the journey home too. [title] You will need to clean the cage thoroughly to remove bacteria. 
[step] This can be done by using an anti-bacteria spray designed for guinea pigs/small rodents or a water and vinegar mix. Don't use cleaning products designed for humans as they could be harmful.