I have a female Boston terrier that is a little over a year and a half. She's always done fairly well on the leash when we take her outside, she just gets a little hyper on occasion. But since we got her around 6 weeks old we have walked multiple times a day. There's no set amount of times, she typically lets us know when she has to go. But for some reason, the past few days she has been flat out refusing to step foot outside. She is doing all of her normal "I have to use the restroom" quirks, but when it comes time to put the leash on her she plants her feet and we have to practically drag her out the door. Once in the yard she just stands there and stares at me. She will sometimes take off full speed towards the house only to be caught by her retractable leash. I feel like she is genuinely horrified of something outside now, but for the life of me I can't figure out what it is, or why she's so scared. I have walked all over our yard and can't find anything that would seem frightening to her, and neither my husband or myself can think of a time something has spooked her outside, but this is really becoming a problem. I really need some advice on what I should do in this situation. Thank you in advance!