Thanks everyone for the support and sharing your pets story.

I only was able to sleep two hours last night having thoughts bouncing
around in my head.

My mom brought over my pet taxi she borrowed. So then I went to the vet to
see Simon.
He was seemed normal but agitated. I'm sure this is from being at the vet
with all the noises.
His one leg felt cool to the touch from the limited circulation. The vet
said that is normal and there is a good chance his leg will recover.

The big unknown is his heart condition. I have to go have an ultra sound
specialist at another location so they can get a better idea of what is
going on.

This is getting expensive. So far all of this including the ultrasound is
nearly $700.

I'll post updates as I learn more.