Sound like Nemo could go outside and eat some grass. Grass makes a dog feel better and soothes their stomach. Just make sure it hasn't been chemically treated. It is also a sign of illness if they start eating ALOT of grass. So keep an eye out. Next time You suspect Nemo has swallowed something Give him a Teaspoon of Hydrogen Perioxide. (Yes the foaming antiseptic stuff you buy for scrapes). This will make him throw up in about 10 minutes. Can give him/her up to 2 teaspoons if larger animal. I had to use it on my dog because he ate my Chocolate Chip cookies while I was outside talking to a neighbor. It took some time but it worked. He did not want to throw up and that is what took so long. He hates to be sick. Good luck!!!