The red mucous should not be present every day. It's not possible to have an accurate diagnosis without testing. Can you ask your vet if they can do a fecal float test on poop? It can find worms and protozoa and determine what kind you're dealing with.
The leg weakness can be caused by coccidiosis. It can also be caused by Marek's virus and neuro-toxins such as molds and petroleum distillates.
The leg weakness can be caused by coccidiosis. It can also be caused by Marek's virus and neuro-toxins such as molds and petroleum distillates.