Hi! And welcome to the Chinchilla Club Forum!
Where is Latvia?
I have used and can recommend Shoots Chinchilla Pellets, Traditions Chinchilla Pellets, Oxbow Chinchilla Pellets and Mazuri Chinchilla Pellets ... those are the only ones I have found that I would use for my chins.
I give him fruit and plants(roses, grass, leaves and those yellow flowers with milk..). Is that bad?
Be very careful what you feed him ... even though he is probably getting more nutrition from the fresh plants you are feeding him than from the chinchilla pellets you are giving him (just my opinion).
Always remember to be very careful about anything that you give him that grows outside ... you have to be careful of pesticides and animals that are sick that can pass the sickness on to your chinchilla by just walking over an area you are cutting to take into your chinchilla for him to eat.
Do you feed him rose petals and all? What kind of grass? What kind of leaves?
The yellow flowers with milk are probably dandylions.
Be very careful with the kind of fruit you give him ... some could kill him. Always give in very small portions ... remember ... when you compare the size of the chinchilla to your size ... a tiny raisin is as big as a basketball to a chinchilla.
But I never heard that chinchillas can eat cherry.... Can't they? Also, I once gave him a very small piece of chocolate. He loved it and NOTHING happened. He lives! He loves nuts and raisins of course and he hates candy from pet store ( special candy for chinchillas with strawberry and yoghurt flavor). I want him to taste everything he can taste.
I never give my chinchillas cherries because it is grown with a pit in it.
Chocolate contains oil and fats a chinchilla's system is not made to digest ... You were lucky this time, I hope you don't do it again. You may not be as lucky the next time.
Nuts contain natural oils that a chinchilla's digestive system is not made to digest and because of this it can cause a fatty liver, which, over a period of time, can kill.
Raisins (no more than one a day) are OK, on occasions, but not as a regular diet ... they contain to much sugar.
I want him to taste everything he can taste.
What you want and what he wants may kill him ... he will eat anything you will give him, as a general rule, but that does not mean it is good for him, or that it will not kill him.
Chinchillas need a quality feed, hay, fresh water, pine chew blocks, a lava stone and a clean cage ... anything else can be considered a treat. They can not miss what they have never had and many things you might think are OK for him, could kill him eventually or almost instantly ... I would not be experimenting with feeding him things that might hurt or kill him.
Just my thoughts on the subject ...
Jo Ann