Feeding is not normally a problem as they
are fed wet food morning and evening and allowed to roam outside during
the
day. The issue is if we are away for the weekend. If we put dry down I
think that Nina would have eaten the whole lot in the first few
hours......
Any probably been sick!!

I google searched for term "Pet Feeder" (with the quotes), and found quite a
lot of "Automatic" pet feeders... you can program it to open at fixed time,
fixed amount. Some of them can automatically feed your pets over 3 days.

Try to get one of those?