Cage Too Cold For Guinea?

In the cage for my guinea piggy, I have a thing kinda like a cavy cosy and at night I cover up her cage with a blanket. Is this warm enough? If it isnt what can I do to make it warmer that doesn't cost much? Thanks

Sounds good, maybe try moving the cage closer to a radiator. That's what I did. There cuddle cup and house is right by the wall where the radiator is too. They love it there when it gets colder in the house.

you could try one of those oil-filled radiator style portable heaters. They have thermostats and have no danger of starting a fire as they are completely contained. About $40.