Ok what about watermelon??
Watermelon is not safe for rats. They can't burp so you want to avoid sticky or watery foods so as to avoid suffocating or choking...the most minor problem they would have is a grumpy tummy :/ Some examples would be, yes, watermelon, peanut butter, ice cream (not just for the liquidy effect but moreso for the fact that rats are lactose intolerant, which means they will get very sick and possibly die if the diarrhea/sickness leads to severe dehydration...so those yogurt drops they love so much need to be given responsibly, same with cheese and other dairy products), pop, jello, etc. I find that it's a very slippery slope when people respond to food questions with something akin to "if it's safe for you then your rat can probably eat it". Some lady almost a decade ago posted that statement in a blog and now I feel like everyone gravitates to it even though it's so highly obsolete that the statement and the sentiment that it hauls along with it are very precarious, if not irresponsible to say to someone else.
People who are just above "super lazy" and fall in to just the "lazy" are going to see that statement and say "Oh! Sweeeeet! I love ice cream and potatoes and peanuts and watermelon...so that's awesome that I can feed my rats that! Oh, and poppy seed muffins!!". ALL of those things are bad for rats for one reason or another but yummy and good for us, right? And that's one drop in the bucket of food facts pertaining to what's good for rats. A lot of it is common sense but since a lot of people lack common sense, that's one more reason to refrain from making such generalized statement that could have a very serious, negative impact on little rat lives and their owners who love them.
My advice, to anyone asking questions, treat forums like this the same way you would advice from your friends : Listen to the advice, appreciate the advice, consider the advice when making your decision but remember that ultimately, you're the one responsible for the decision making and since you want to make the right decision, get ALL facts first. Go to .org websites, read research studies from respected and accredited colleges, museums and libraries.
This community is great and everyone seems very caring and thoughtful so please do not misread my intent with this email. I suppose that I just saw a few potential problems with some of the replies in here and I wanted to try and point out some things that perhaps some people may not always think about or remember, that's all
I'm excited to "meet" all the rat lovers in here!!