After close on 20 years crossbreeding with Jersey and hol/fr semen we have gone solely high ebi friesan since 2015.
We noticed in our dg especially that the guys with the high ebi herds of friesans were surpassing our herd performance and have kept it up, good few in the DG doing over 550 kg consistently with around 1t fed.
Last year we did 490 kgs solids @ 3.87p and 4.72 bf with a herd av lactation of 2.9.
The goal would be to do 570 kgs at 3.9p and 4.7 bf with a mature herd av 5 lactations
I think it's very doable. Our % have increased since weve gone solely friesan ebi. Our herd is young and the litres will come with maturity.
Cow size, solids and fertility take generations to get right in cows if you're going to breed them yourself. We still place big emphasis on this and its paying off i think.
Our cows are a little bit bigger of late but we're up .4kgs ms per cow per day so far this year. If they keep it up they'll produce well this year.
I think with the gains ebi has made in the last 10 years podge that you would be mad to go crossbreeding