Changed the pellets i give my fishes from an unknown brand pellets to hikari golds a couple of weeks ago. All the other fishes in the tank had no problem eating the new pellets but my jags somehow didnt like the new brand. they gobbled the old one but the hikari's they just take a few bites and crush the pellets then spit it out. eventually they will eat a few pieces but they never fill up like they did with the other brand. any tips to entice them in eating the new pellets?