Please can someone help us, my sister and I are at our wits end. Okay so our 20 month old cocker spaniel has started housetraining regression and is pottying in the house for a no2 and no1. She started toileting in the house about 2-3 months ago it started right after we had to change he diet due to allergies she had devoloved we had to move her onto a dry biscuit diet for health reasons and it's been pretty constant since. She always always toilets in the house during the night at least 2 to 3 times even though either my sis or I get do get up in the night to let her out in the small hours, she is always let out before bed. We are on the ball with letting her out canstantly throughout the day and she rarely has an accident in the day (though it has happend when were not on the ball) it's just the nights where she just goes whenever and where ever. It's worth mentioning that she was not easy to house train as a puppy at all it took us a long time to housetrain her and we did end up having to use puppy mats, but we finnaly did it with lots of persistance, time and patience. She has been fine for well over a year with her house training its just these last few months. Another thing worth mentioning is that she has never ever ever told us or alerted us when she needs the toilet, she dose not bark or lead to the door or anything we had to housetrain her more with structure and consistancy i.e letting her out every hour on the dot. Please please can someone help its getting very upsetting to see her doing this. Thank you for any help and advice you have.