my cats really ill lately so last night i stayed up late and watched the original David Attenborough Blue Planet with him laying by my side watching with his bowl and water

Kind of blown away by how beautiful it was, i haven't watched it since i was a child. Ngl I'm worried my cats going to die from this, he's suddenly so much weaker and thinner over the last week and a half and i can't get him to a vet until thursday, im keeping him warm and comfy in the meantime, getting his favourite food from the petshop and being stricter about keeping him indoors bcs im not sure what else to do.