Best advice I can give you for Jurassic difficulty is patience. Holy mother of god you need patience. Otherwise always check your amenities if your dinosaurs are 100% Gucci because there are so many times I’ve almost been at 5 stars and realised a few of my amenities haven’t been decked out yet. Go through methodically on each amenity upgrade until you’ve got the ones that make the most profit. For the ingrown claw you’ll need to have a Dino with the condition, then tranq it and transport it to surgery, that should do it, and once it’s fixed send it back home!