Dogs with allergies — whether to environmental factors like pollen or food allergies — tend to get more ear infections as well. (fidouniverse.com)
Can feeding your baby formula cause them to get more ear infections and congestion? (myorganicformula.com)
I'd also add that there are numerous studies out there that prove the «dangers» of formula feeding are minimal, pretty much the difference of a few more ear infections and a case or two of stomach upset a year (both of which can be explained by the modality of the feeding; ie, if you let your baby drink a bottle lying down, it can cause an ear infection; finding the right formula can prevent stomach problems). (ecochildsplay.com)