twilight: between daylight and darkness; a period or state of obscurity, ambiguity, or gradual decline (Oxford American Dictionary)
Part 1: Max
My two old Jack Russell terriers are in their “twilight years.” Max, a bit farther along than Casper. And yet there are days when I’m not sure how much longer I will have Casper.

He’s not been eating well for about the last month or so and is down to 11 pounds. (at his healthiest he weighed around 14). The weight loss hasn’t happened all at once - it’s been a gradual thing. Now when I lift him up, he is as light as a small cat. Due to worsening digestive issues he’s moved from his “EN” (gastronenteric kibble) to boiled rice and ground chicken (cage free, of course). An off-hand comment from my wonderful vet (who has cared for Max since he was a pup) led us to give him a dollop of plain yogurt with his meals, which he loves. The added benefit of the yogurt allows us to hide the metamucil and dose of flagyll he must take. When he recently started refusing the chicken/rice mixture, we switched to ground beef and rice - a decision that goes against my personal “no beef or pork” policy. But it’s for Max. And he’s been eating a bit better, so it’s worth it.
Twilight: obscure and and ambiguous; a gradual decline
Part II: Casper

Last summer, when I put up a couple of goldfinch feeders, he sat on the porch and watched them as they gathered to eat. Due to a gradual hearing loss he couldn’t really hear their sweet chirps but he really enjoyed watching them. This summer he is completely deaf and now only partially sighted. No bird watching now. He is really pretty healthy; except, some mornings he has these “spells” where his legs and head convulse and spasm and he loses his balance and walks around the yard like a little drunk, his legs giving out on him as he falls to the ground. These episodes last about a half hour after which he is completely fine. These spells can’t be treated and are just part of the process of his declining years.
Twilight: between daylight and darkness
Epilogue
This is a sweet, sad time for me. They could be with me for another year or two! Or, this could be their last summer. Small, scrappy dogs have a way of hanging in there, I’m told. But still. I can’t know for sure, so these “twilight days” are precious to me. I am committed to enjoying them, and accompanying and assisting them in their dignified, steady decline. No need to pity them. No. Ceasar (Millan) would not approve, after all! They don’t need pitying, anyway. What’s to feel bad about? THEY certainly aren’t feeling sorry for themselves. They live in the now, and their now is actually pretty good! Or at least that’s my goal for them - to make sure they are comfortable, and to let them know they are loved and cherished.
Anyone with an elderly pet can identify with all of this and worse! For those of you who don't have pets, forgive me for this indulgence.
But as they have accompanied me through these difficult couple of years, I am keenly aware of my role in their lives as they journey toward the end of their days. We are drifting through these lazy summer days, my "boys" and I; drifting through the daylight into the darkness and beyond . . .
Anyone with an elderly pet can identify with all of this and worse! For those of you who don't have pets, forgive me for this indulgence.
But as they have accompanied me through these difficult couple of years, I am keenly aware of my role in their lives as they journey toward the end of their days. We are drifting through these lazy summer days, my "boys" and I; drifting through the daylight into the darkness and beyond . . .