I thought this was going to be a complaint about the increasing use of pouches too and the fact that they may not be recyclable.
What is wrong with pet food coming in tins? As far as I know aluminium cans are recycled, are easy to wash out (essential) and there were recent reports that there was a shortage of tin cans resulting in shortages of some foods.
It seems to make sense to me but it may not be that simple.
BBC Radio 4Extra Scheduling Shake-Up.