Ivy is actually a very desirable plant, home to many useful insects, and if it grows big enough to flower, it's a valuable source of early nectar for emerging insects and bumblebees. We have 'ivy trees' along one side of our boundary, where ancient hawthorns have become overgrown by ivy, making a good thatch inside for roosting and nesting birds. I cut it back hard over the winter and then it re-grows with lovely fresh light green leaves in spring. In the front garden the old fence is almost entirely supported by the ivy, and it looks a lot nicer than clean bare wood.
How's Hetty getting on? Fully recovered yet? It might be a good idea to collect most of the windfalls before they get to them, as an overdose of fruit may lead to poo problems again. My ration is about 1/2 an apple each or maybe 3 apples between the 5 of them as they're not very big apples.