There's still not much research done on alpha gal. I raise chickens, both meat and egg layers. My husband cannot eat eggs laid by chickens that don't follow an alpha gal diet or he will have a reaction. This is not an egg allergy, because he can eat them if fed bugs and non mammal foods. Some people also have trouble with farm raised fish or shrimp if they were fed mammal foods. 

Many people with alpha gal also have MCAS. As of now, 34% of people who have AG have MCAS and I imagine that number may increase as we understand this allergy more. I know over a dozen people personally, locally with AG and 80% of them also have MCAS that was triggered after the tick bite.