If you’re following the Venting thread over on Off Topic, you know one of my barn cats, Sonic, went missing for two weeks. He came back Saturday, disappeared again, then came back Monday morning. He was starving, and ate everything I put in front of him, but the eye membranes were white, so I immediately rushed him to the vet for a checkup. Checkup showed that he was anemic (red blood cell count is 30; anemic is considered 28 or lower, per vet). No parasites in the stool. Nothing showed on a tox screen or in the regular blood work. Kidneys, liver, etc. all normal. He had lost 2lbs while he was missing, but his appetite is quite good. The vet did an ultrasound as well, and found nothing.
He’s also simply not himself. This is an outgoing cat who is quite confident; he’s not like that anymore. The neighbor across the road mowed his pasture Monday morning, while Sonic was in the large crate in the barn (ready to get to the vet) - he freaked out. This is a sound he’s heard all his life, and for some reason he was totally flipped out about it. He cries and cries in his crate. At the vet, he buried himself under the mats and newspapers in the cage. All of this is highly unusual for him.
I’m at a loss. I’m used to dealing with anemia as part of FIV or FeLV, but he’s been vaccinated for FeLV and tests negative for FIV. Any ideas on what we could look at, if he doesn’t start to get better soon? The vet gave him Convenia and a dewormer (Pyrantel) just in case, but I’ve got a feeling it’s something else, something we’re missing.