How many points from magic food can I add before it turns red?

either from black stat or green.

Turns red? 

My understanding is that each magic food has a cap at 50. So that means if I wanted to use Cactus Melons to increase Constitution I can- but only by 50 points. Each melon increases by 1-3 points. As I get closer to the 50 point cap then the amount of points that goes up each time decreases. At least that is my understanding. Is that what you mean?

I'm a bit confused by your question. Maybe I'm just tired, it's late. o.0

I had a pet that with bad stats so I used mutagen to change his stats, To experiment how the mutagen worked.

Then I used magic food on the green stat and normal gene after a few magic foods it turned red, I wish I had keep him to show you. Just in case I didin't use the 50 points.

Hm it is a shame you don't have that pet anymore.. 

At either rate, this seems to have to do with how genetics and GP work. Angel once explained that in an answer to some level-up question a long time ago.. Most likely the pet had Genetic Power (also since you said it had green stats), but a negative gene there. The GP gives it +10/20/30 stats (so a fixed amount), but the negative gene only takes off a percentage of the stat. So when a pet is level 1 (or the stat is low enough), it still shows up green because the +10 is bigger than the percentage taken away by the gene. But when the stat increases either by leveling or by giving the food, suddenly the percentage outweighs the +10 and the stat turns red.

I'll try an example: 
Say base stat is 26. Then you add +10 for GP 1, so you have 36. But then the pet has a gene that takes away 25% of the stat (25% of 36 is 9), so your end stat is 27, which is still higher than the base stat of 26 and the stat would show up green.

Now let's say you add a few points with magic food and you get the pet to a base of 30 (for ease of calculating). Add the +10 for GP1, you have a stat of 40. If you now take 25% (=10 points) off, you end up at 30 again, same as the base stat! The stat would now show up as black.

Let's assume that you level the pet a while or give it more food. You now have the pet at 34 base points. The game adds +10 points for GP1, leaving you at 44. 25% of 44 is 11, so now the bad gene already takes 11 points away from your 44, ending up at 33, less than the base stat (34!)! And now you are where you (probably) were with your pet, now suddenly the stat is showing up red because the genetic modifier makes the stat lower than the base stat would be. 

So yeah.. It would have been great if you still had the pet but I'm pretty sure that's what happened because I really doubt you gave so many foods that you added 50 points (since 1 food gives between 1 and 3 points only)!

Thank you Timain, your explanation is awesome. At least it makes total sense to me  :)

And now that you mentioned I think my pet had light bones and that's the one I was trying to increase. That's how it end up red.

thank you sandia for bosting this thread It's very useful for me XD

a little stubid question : what is the 50 points =\ ?

I have another question but I'm so lazy to create another thread so I'll post it here if you don't mind

my pet paimon here http://beastkeeper.com/pet/102961 have Lionheart and Fragile bones I used a mutagen on him to see how the mutagen works and change the Fragile bones suddenlly it changed the lion heart to Faint-hearted and the Courage from green to red the question is can I change it again and restore the lionheart gene ? and how can I use the mutagen to get Positive gene ?

There are never stubid questions. XD

50 point =  

When you give magic food to a pet, it would add 1 to 3 points more to your desired stat but you can only feed him until it reaches 50 points more than the original stat.

Mutagen =

The problem with mutagen is that is random which gene it would change, my experience is that it would change to a bad gene more often that not. Also it would not only change the gene, it would change wich is dominant like in your pet

lionheart with a power of 40  vs faint-hearted with a power of 60

There are 20 gene spaces and about 56 different genes to change just for the gryphon, so the odd are not that good lol

so there is no way to change his gene again ?

Yeah, like sandia said, I'm afraid you're now stuck with that. There is no way of selecting a specific gene to change to something else. Using Mutagens is really very, very risky and often destroys somethign good instead of changing something bad to good. 

On a sidenote, it can also change colour genes, so it could even happen that the pet suddenly changes colour on you if you retry. 

If you want to play around with Mutagens, I would recommend using a pet you don't care too much about. If you're lucky, your so-so pet turns into something awesome, but if not, no big deal. 

Just sad that paimon is pretty much stuck the way he is now :(

thanks everyone

I hoped that he can back as first again =(

I'll never use a mutagen again after what happened to paimon ..

Sorry about paimon, but you can use the mutagen in a pet with really bat stats and low level.

A question about breeding after a mutagen.

Will the next child have the new genes obtained or the old ones?

The new genes. A Mutagen permanently changes the genes, so when you breed with the pet the game will only check the for the genes the pet currently has, not what he used to have.

That's great I was affraid it would keep the original genes for the breeding.

Thanks Timain  :)