Sorry but I have absolutely no support for this suggestion; I'm strongly against it. Symurghs have a reason for their Fertility, to give it away to just any species would ruin it. I wouldn't suggest giving Pumas Fire Gland and Spitting Muscle since it would be cool for them to breathe fire. It wouldn't make any sense.
"Half-canine and half-avian, she is a quintessence of life and prosperity, fascinating the people with grace and mesmerizing colors. It's a giant creature that is big enough to deal with a Dragon - the size of Symurgh is close to that of an adult Roc. Nobility and dignity are essential parts of her nature, so before she decides to help you, you'll need to convince her that you're worthy of her. Her natural powers are fertility, purification and regeneration.
The native world of Symurghs is Io. They prefer abundant mountain landscapes with open water sources like rivers, ponds and waterfalls. The ecosystem and Symurgh live in symbiosis: the land provides Symurgh with everything it needs while the animal increases the fertility of nearby lands being a source of a specific aura which affects all protein life forms. The initial research group discovered that this "aura" is actually a very generic type of pheromones that affect the process of cell division, making it more stable, and increases the speed of metabolism. This improves immunity, helps to recover from wounds and produce crops and offsprings faster than usual. The Mages suppose that Symurgh developed this property naturally because of the huge amount of food required to support such a large creature on a planet with scarce resources. Somehow they need to support the area where they live, or it would be devastated."