ยอดอ่อนกระถินยักษ์ ใช้เป็นอาหารคนและสัตว์ได้ and it would not take much to make dry animal feed product from this tree. But please see below.

Leucaena leucocepphala
From Wikipedia:
...The legume provides an excellent source of high-protein cattle fodder.[11] However, the fodder contains mimosine, a toxic amino acid.

In many cases this acid is metabolized by ruminants to goitrogenic DHP [3-hydroxy-4(1H) pyridone] in the rumen,[12][13] but in some geographical areas, ruminants lack the organisms (such as Synergistes jonesii) that can degrade DHP.

In such cases, toxicity problems from ingestion of Leucaena have sometimes been overcome by infusing susceptible animals with rumen fluid from ruminants that possess such organisms,[14] and more recently by inoculating cattle rumina with such organisms cultured in vitro.[15]

Such measures have facilitated Leucaena use for fodder in Australia and elsewhere....