Accidental Vege Gardener

I tried to get on the grow your own veg bandwagon. However I have to deal with Mr Pigalina who fears the dog has weed on all the plants, birds who eat the produce and a dog who digs up the plants and buries bones under them. I need to get a green house, but green houses cost money and effort to build.
Peas though, are not a problem. Last year I planted six peas resulting in enough peas for two meals. This year I planted none but have a thriving pea plant.