I was trying to use several philters on several pets. I got them all at once (Meaning I purchased them in one transaction at the scale shop), one Philter of Acumen, on of Nibmleness and one of Accuracy. I didn't bother to see if they were actually in my inventory or not, but when I went to the eggs i wanted to use them on, they did show up in the drop down.

I first tried to use a Philter of Nimbleness on pet 6806756, but the agility didn't go up. My first thought was that i hit the wrong button and it was my mistake but I'm not sure.

I then went to pet 6806760 which I wanted to use the Accuracy on. I was worried i had mixed up dex and agility and that was why I didn't see it apply, but I still showed all three philters in the dropdown. I tried to use the Accuracy one on this pet, but the stat didn't change again.

Finally I went to pet 6806759 which I wanted to use the Philter of Acumen on. I was really careful this time, and I still saw all three philters in the drop down. I made very sure to click the Use Selected Philter button and not either of the other two but I still didn't see the stat applied.

It's possible I messed up one of the clicks, I'm not sure, but at this point I only have the Philter of Acumen in my inventory, which is the one I was absolutely sure i used correctly, but I don't think I got the stat boosts on any of the three pets.

This issue has been addressed and should now be fixed:

https://www.sylestia.com/forums/?thread=101372&page=1#5

Unfortunately, prior to these changes, I can't verify anything regarding your Pets. I can't verify if their Stats were changed nor which Hatching options were used. =\

From now on, though, I will be able to verify these things for players in case a player is unsure of what happened.