If you look up Boron fertilizers such as "Fertibor" or "Granubor" they are called: "Sodium Tetraborate Pentahydrate" and the "Borax" cleaning product you find in grocery stores is: "sodium Tetraborate Decahydrate" I know they are very similar but the "Borax" cleaner has 10 water molecules hence its chemical description (decahydrate) and the Fertilzer grade bought in co-op stores is "pentahydrate" meaning 5 water molecules. Is it a big deal?

The old may have had the N leach out, but it would still be very good compostable OM. Compost it all if you feel the need to remove it from the field.

I have been working with horses since 1964. My horses range in ages of 2 years old, 5 years old, 15 years old, 20 years old and up to 25 years old. In the past 5 years, hay producers in my area have turned to using poultry litter on their hay field as fertilizer because of costs. The square bale hay looks green and great, but my horses just sniff it and walk away. They waste it. They won't eat it. Each year, I have to return the hay and buy hay that was not produced with poultry litter. Thank goodness, most hay producers are being honest when I ask if they used poultry litter in the production of their hay. Last year, when I took 100 bales home from a hay producer that I had bought from previously that season, my horses would not eat the hay. I called the hay producer. He confirmed that he had distributed poultry litter in the production of that hay. When he looked in his notes and realized that I had requested non-poultry litter fertilized hay from the start, he came to our place and removed the 100 bales of poultry litter fertilized hay and replaced it with hay that did NOT get produced with poultry litter. My horses immediately started eating the hay that did NOT have poultry litter used in the production of it. So, here is my question. Has anyone experienced this problem with their horses? If so, what did you do? This has happened to me with 4 separate hay producers. I cannot find anything on the internet that explains this problem. I understand that it is a fairly new process, but surely, someone is recognizing the problem besides me!!! I got a response: "Be careful feeding this hay to your horses. Chickens spread salmonella. I myself, would never feed my horses this type of hay." Should I be concerned??? I got another response: "Not at all uncommon. A lot of horses don't like hog manure fertilized hay either. Not new at all. A lot of farmers use manure from chickens and hogs when the price of commercial fertilizer get high. In years past it was much more common. Guess what, if that's all they have to eat for a few days, they get over it, and eat it just fine." My reply was: Have you had the experience with horses not eating their hay?...and you continued to only give them that hay AND they started eating it??? If so, what problems did you observe? Any health issues? From my experience, this behavior of not eating their hay is not natural. I have been feeding my groups of horses for 48 years. This issue with my horses not eating the hay given them has only occurred since the poultry litter has been used as fertilizer, which has been in the last 5 years. I understand the farmers' need to keep down costs, but for the end result to be that the product not be used (wasted), that seems to defeat the purpose of growing the hay. I wonder what problems have occurred that have not been registered by some agency....where would one report this anyway? It is just not natural for my horses to refuse hay. This is a BIG problem for me. My experience is that the hay producers really don't want to hear this. Yet, to be honest, they need to know this. Here was the response: "Yes, I've had experience with hay fertilized with chicken, hog, and cattle manure. Sometime they eat it without a problems and other times, a couple of days of it alone, and they eat it just fine. The smell is usually the problem. If they get hungry, they will eat. Chicken is very high in nitrogen and bad about burning if applied to heavy. It should be composted for awhile before applying. The problems associated with e coli, etc, are usually not there if the application doesn't burn up the hay crop. Seldom do they apply any of these close to harvest time, which gives mother nature plenty of time to dispose of e coli, etc. Sun and rain, will do an excellent job of decomposing. It was used a lot around here, more so, a few years back, and never heard of any problems feeding the hay to horses. When the farmers used horses for tilling it was used extensively for horse hay." Does anyone have any advice on Hay fertilized with poultry manure and the possiblitity of Salmonella risk??? Thanks

Actually manures are not that high in nitrogen, not compared to say inorganic fertilizers.. you can apply fresh manure around the beds, horse dries faster IMO than cow, but this will be a debate that lasts the spans of gardeners. However, fresh manure is high in one thing, salty compounds, this is what is likely to cause burns, leave it a couple inches away from the plant however, if you are going to spread it, Ive found a few weeks in the sun and the horse manure is pretty much ready to go. This is a MUST READ LINK on manure... from our friends at the univ of Minnesota.. Great link Manure Management The horse manure I get varies in age, from days to years, as the place I get it also puts new stuff in front and you cant get the old stuff until the new stuff is moved.. this year, alot of the new stuff was gone, so I got some really composted horse manure.. Silverkelt