Thank you samwiseg. One always wonders when or whether it's the right time and I think it was. Having watched him for many days, he progressively got worse, but very slowly and he did have a good quality of life, but that afternoon, he seemed not interested in anything. These tumours really are an awful problem in budgies.
Fly high: Billy Boy, Charlie, Harvey, JoJo, Joe, Lacey, Missy, Oscar, Pickle and Smudge. RIP: Penny, Poppy, Lola, Georgie, Bea, Morgana, Phoebe, Truffle, Hazel, Tilly, Tuppence and Mollie.