OK so some background info. My guinea pigs are usually very active and get a reaction when i come downstairs. They love running around...usually. alright into the point.Usually they like running around. Now they kinda just sit in there cages and just do nothing. They also like to sit in there den and do nothing. when i come they have reaction, but its very slow. they might just slowly walk over. When i put them on my lap or something they just sit there. might spin around and get comfy. which i like to watch but not the usual behavior. and i don't know if i should go take them to the vet or not. so if any advice is here please tell me i would love to hear it! thank you!