First- it is not only possible, but probable that allergies develop after a year. They are always a delayed reaction. I developed severe cat allergies after having cats for 30 years, and developed a dog allergy after I had the dog for 2 months. (I get immunotherapy shots for both) Having said that, doodles are supposed to be less allergenic, and the fall allergens this year in New England are through the roof.
Are the dogs potty trained? Do they need to be together? How are they behavior wise? Thanks.