For me there is not much to consider
I'm getting older and so are they! My farm was established years ago and I was one of the lucky ones who had good demand and good animals. Our show wins provided a waiting list of buyers -- the MARKET was alive and well!!!
When my husband became terminally ill, we did a dramatic downsize which gave ME two dramatic losses, my soulmate and much of my herd! As fate would have it, I kept several of my very best and have actually bought back some which were sold at that time (sales contracts and constant contacts helped this to happen)
I have not gotten back into donkeys, which I miss, but that was my own decision for limiting myself.
I feel for each of you and KNOW the pain!! Unfortunately, the market is far, far, far more limited now than 10-15 yrs ago, when it was booming. I now have 43. Yep
They are fed and loved, only occassionally bred.
The senior group are here for the duration. They took care of me when I needed them and I will do the same for them. There are several mid-age who do produce lovely foals, I just don't need to make more babies when I'm not ACTIVELY promoting, showing, etc. Shame, really, as they are quite correct and viable in their own right, as have been the foals. BUT, I see little need to just "produce more". I then have a "younger" group. A few select breedings I have done with the full intention of keeping them. Should I jump back into showing, I have animals on site to do this (and a 6.5 y/o grandaughter who may want to).
My downsizing will be mostly by attrition.
Those of you who are not so lucky, I suggest you first decide the numbers to keep that are best for YOU. Then, decide what you are ACTUALLY going to do with those left -- i.e. do you show, must you breed, etc. This second phase is quite critical for determining who/what/how you decide what to keep. Let's face it, if you are NOT showing (for whatever reason) you might consider re-homing the best to a farm that is, etc. Do you have an older one who is now a super loved pasture ornament? So maybe that one could be an "extra" -- leaving that last few years of life in a place that is familiar, loved and where they are cherished. Yeah, theres that EMOTION again.
And, lastly, could the way in which you maintain them be changed to help ease your own efforts?
It's been years since I had 50 head brought into individual stalls each day!!! They are healthy and do very well with their run-ins. The stalls in the barn are there for foalings, or special needs, training, fitting, occassional outside breedings, etc. Sure helps with MY time -- the demands of their care are better handled and scheduled this way.
ADDED: I am NOT downsizing!! I'm only replying to what I did when I had to downsize. My herd will downsize as nature determines their time on Earth is over....I sell a FEW foals but, mainly only breed for ones I want to keep. Sold 3 in 6 yrs to great homes! Breeding for foals has become a seldom thing. LOL The stallions have complained a little but, understand.....well, adjust anyway !