As you may be aware of kiba my gsd 4 and 1/2 and has had many problems with her bowls and stomach before and still having problems todays date, i cant seem to get to her to go for a wee when i take her outside (due to living in a flat and have no garden)

she has settled in well and i have lived in this flat for a year next month. She did take time to get used to going outside rather than a garden like she was used to but she got there in the end bless her!
Over the last 4days she has been really stubborn and wont go for a wee when i take her out, ie: over the days Mon,Tues,Weds she done 2 wees outside.. i no she needs to go as she goes to crouch done and do a wee then gets back up again. Other times she just messes about and does nothing.. any idea what i can do to get her to go or why she may not be going at all??
Many thanks
Crystal