We've never done the experiment, but there are innumerable germs that infect across species, so they'd be catching all kinds of stuff. "FIV cross-species trans

We've never done the experiment, but there are innumerable germs that infect across species, so they'd be catching all kinds of stuff. "FIV cross-species transmission: An evolutionary prospective" is an interesting paper as an example. It seems FIV infects all cats in the cat family. That paper has a long discussion of the old and new world cat problem as relates to FIV. I'm well aware that saber tooth tigers are not dinos but if we brought saber tooth tigers back they would probably be screwed over by FIV either instantly or at least very soon. An interesting google search phrase is "diseases of farmed crocodiles and ostriches" and apparently there's a reason our supermarkets are full of the livestock we eat; raising meat crocs looks like a HUGE disease headache. Imagine a giant 400 foot long dinosaur suffering from Caiman Pox. Raising disease free reptiles that we already have experience with seems to be a big headache; I predict it would be pretty tough to raise dinos.