My hamster is a Russian Dwarf, so the following tips may not be applicable to all hamsters!
1. Hamster mix, which includes seeds, grains, dried corn pieces and pellets, is okay, but do note that sunflower seeds are high in fat, and this will result in a ballooning of the hamster’s weight. Hamsters tend to choose the kinds of food they like from the mix, and then ignore the rest–and they usually go straight for sunflower seeds. But too many sunflower seeds can shorten your hamster’s life span too, so you have to be a little careful.
It’s a lot better to feed the hamster healthier food pellets, which are often non-selective and ensure that your hamster has a balanced diet. I also found out, from here, that these pellets can also provide “the fibrous grass pellet element that most hamsters try to avoid but is needed for an efficient digestive system,” so it’s a huge yay.
Of course, a pellet diet can get pretty boring, so don’t go too cray on this one. Ultimately it’s up to you to choose which kind you want, just make sure that you keep these nuggets of information in mind! My hamster’s weight is off the charts, and he has become pretty fat, which is cute but also slightly worrying since he is only about two months’ old, so that’s why I decided to switch from hamster mix to food pellets for now. 🙂
2. Fruits and other treats are alright! Some websites recommend giving treats once every two days, others once a week, some have even stated once a month. I would recommend giving the hamster treats once a week. Too much fruits can result in hamster health problems like wet tail (fruits with higher water content like watermelons are more problematic as a result), so if you go for twice a week, I find that there’s a risk lurking around somewhere. Once a month is absolutely crazy evil Ursula shit, don’t do that. Like, how would you feel if you could only eat ice cream once a month. I thought so.
You can’t give the hamster all kinds of fruits though. You might want to Google which aren’t okay, because there’s a long list of Yes-Yes and No-No foods out there. So far, apples, strawberries and grapes (all without the seeds–the seeds are toxic), mangoes and bananas are alright. Citrus fruits (like lemon, orange), pineapples, tomatoes and raisins are not. Also, because dwarf hamsters are more susceptible to diabetes, it’s best to keep fruits with high sugar content to a minimum too (source) 🙂
3. You can feed the hamster other things, like eggs and chicken, as treats. Hamsters are omnivores, so it’s totally cool. Just make sure that there’s no oil and seasoning being used. I haven’t tried chicken yet, but I have fed Sir Blubber Butt eggs, and he loves it. 🙂 Instead of frying the egg, just cook it in the microwave or boil it under it’s thoroughly cooked. Also, it’s better to feed your hamster egg whites instead–they’re the source of protein, and are healthier than egg yolk, which is high in cholesterol.
I don’t think it’s okay to give a lot at one go though. And I don’t think it’s good to give the hamster eggs all the time. Just think about moderation and all that, I think it’ll make sense. It’s like how you can’t eat junk food all the time, I think.
4. Quantity of food? Go with one tablespoon. Once in the morning, and again in the evening 🙂