train posts (if any):

array(5) {
  [0]=>
  object(stdClass)#2446 (4) {
    ["ID"]=>
    string(4) "3657"
    ["post_title"]=>
    string(34) "Training: Dog 3650 - Behavior 3656"
    ["post_type"]=>
    string(5) "train"
    ["post_status"]=>
    string(7) "publish"
  }
  [1]=>
  object(stdClass)#2450 (4) {
    ["ID"]=>
    string(4) "3659"
    ["post_title"]=>
    string(34) "Training: Dog 3650 - Behavior 3658"
    ["post_type"]=>
    string(5) "train"
    ["post_status"]=>
    string(7) "publish"
  }
  [2]=>
  object(stdClass)#2449 (4) {
    ["ID"]=>
    string(4) "3661"
    ["post_title"]=>
    string(34) "Training: Dog 3650 - Behavior 3660"
    ["post_type"]=>
    string(5) "train"
    ["post_status"]=>
    string(7) "publish"
  }
  [3]=>
  object(stdClass)#2448 (4) {
    ["ID"]=>
    string(4) "3663"
    ["post_title"]=>
    string(34) "Training: Dog 3650 - Behavior 3662"
    ["post_type"]=>
    string(5) "train"
    ["post_status"]=>
    string(7) "publish"
  }
  [4]=>
  object(stdClass)#2441 (4) {
    ["ID"]=>
    string(4) "3665"
    ["post_title"]=>
    string(34) "Training: Dog 3650 - Behavior 3664"
    ["post_type"]=>
    string(5) "train"
    ["post_status"]=>
    string(7) "publish"
  }
}

meta keys containing "train":

array(2) {
  [0]=>
  object(stdClass)#2388 (1) {
    ["meta_key"]=>
    string(17) "behaviors_trained"
  }
  [1]=>
  object(stdClass)#2451 (1) {
    ["meta_key"]=>
    string(11) "plan_trains"
  }
}

jet_rel tables:

array(2) {
  [0]=>
  string(20) "wp72_jet_rel_default"
  [1]=>
  string(25) "wp72_jet_rel_default_meta"
}

a sample behaviors_trained value:

object(stdClass)#2455 (2) {
  ["post_id"]=>
  string(4) "3683"
  ["meta_value"]=>
  string(17) "a:1:{i:0;i:3661;}"
}

what is train ID 3661?

array(3) {
  ["ID"]=>
  int(3661)
  ["type"]=>
  string(5) "train"
  ["title"]=>
  string(34) "Training: Dog 3650 - Behavior 3660"
}

that record's meta:

array(9) {
  ["progress_stage"]=>
  array(1) {
    [0]=>
    string(1) "1"
  }
  ["owner_id"]=>
  array(1) {
    [0]=>
    string(1) "1"
  }
  ["dog_id"]=>
  array(1) {
    [0]=>
    string(4) "3650"
  }
  ["behavior_id"]=>
  array(1) {
    [0]=>
    string(4) "3660"
  }
  ["scratchpad"]=>
  array(1) {
    [0]=>
    string(0) ""
  }
  ["loves_it"]=>
  array(1) {
    [0]=>
    string(1) "1"
  }
  ["current_focus"]=>
  array(1) {
    [0]=>
    string(1) "0"
  }
  ["cues"]=>
  array(1) {
    [0]=>
    string(133) "a:2:{i:0;a:2:{s:4:"type";s:6:"verbal";s:7:"details";s:8:"Chup (S)";}i:1;a:2:{s:4:"type";s:6:"verbal";s:7:"details";s:9:"Chomp (C)";}}"
  }
  ["hidden_from_view"]=>
  array(1) {
    [0]=>
    string(1) "0"
  }
}